Tool-holder.



' J. H. FRANZ.

, 001, HOLDER.

APPLICATION FILED DBO. 18, 1911.

1, 1 08,733. Patented Aug. 25, 1914,

' 2 SHEETSSHEET l.

t I I ATTORNEYS ms zvon'ms PETERS 00., PHOTO-LITHQ. WASHING-fawn c 1 J. H. FRANZ.

TOOL HOLDER.

APPLICATION FILED DEC. 18, 1911.

1,108,733. Patented Aug.25,1914..

z snmrr$-snnnw 2.

WZ Q,

INVENTOH WITNESSES v ATTORNEYS JOHN HAREUY FRANZ, 3915131111035, MARYLAND.

. TOGL- Specification of Letters Patent.

"aonnnn.

Patented Aug. 25, 1914.

Application filed December 18, 1911. fierial No. 666,323.-

To all whom may concern Be it known that 1, JOHN 'H. Franz, a citilathcs olaners and other metal workin machines, and it consists in the combina tions, constructions, and arrangements here in described and claimed.

in object of my invention is to provide a device for holding tools in the most advantageous and practicable positions.

A further object of my invention is to provide a device which results in an economy in high grade steel tools.

A further object of my invention is to provide a device in which the removal or replacement of a tool for 'resharpening or for other purposes is greatly facilitated.

Other objects and advantages will appear in the following specification, and the novel features of the invention. will be particularly pointed out inthe appended claims.

My invention is illustrated in the accom panying drawings forming partof this application in which Figurel is a side view of my improved toolholder, Fig. 2 is a plan view thereof, Fig. 3 is aside view of a modified form, Fig. d is a plan View of the form shown in Fig. 3, Figs. 5, 6, 7 and 8 are diagrammatic views showing the use of my improved tool. holder, Fig. 9 is a side view of a modified form, Fig. 10 is a plan view of the form shown in Fig. 9, Fig. 11 is a plan viewof another modified. form, and Fig. 12 is a plan View of the form shown in Fig. 11.

Referring now to Figs. 1 and 2, 1 have shown therein the tool holder which comprises a shank 1 having ahead 2, the forward end of the head tapering to an angle at 3. On each side of the head I cut a slot, such as those shown at i and" 5, the inner walls a and 5 of the slots being parallel with the angular front edges of the head, as clearly shown in Fig. 2. A slot 6 is cut in the head and into a portion of the shank arallel. with the upper and lower surfaces of the tool holder. A stud bolt 7 is securely fastened to the lower portion of the head below the angular slots l and and projects through an opening 8 in the portion of the head above the angular slots. A not 9 is screwed on to the bolt 7 as shown.

From the foregoing description of the various parts of the device the operation thereof .rnay be readily understood.

A tool such as that shown at T in Figs. 5, 6, 7 and 8 is designed to be placed in either of the angular slots l or 5 and to be securely clamped by turning the nut 9. in Fig. is illustrated the ordinary position of a tool when operating on work J in the direction of the arrow. In this figure it will be observed that the tool may be run close to the work, the tool holder being held in the tool post P. It will be apparent that the closeness of the tool holder to the work will permit the use of a smaller tool than if the tool were held directly by the tool post P. In Fig. 6, the tool holder is set so as to work closely up against the flange F of the pieceof work J, the tool being shaped to conform to the fillet advantage of the angular'shape of the head is at once apparent, since it permits it to come close to the flange F without touching it. In Fig. 7, the tool is working on the opposite face of the flange F, and it will be seen that the tool can be run to the center and yet the tool holder will be out of the ay of both the flange andi the lathe center K, owing to the angular faces of the holder. In Fig. '8 R represents work which is so- In this figure the cured in the chuck of a lathe. In this position a suitable tool P may be used to work in the hole 1'. This may be replaced by any suitable tool to work in the recess t.

In Figs. 3 and l, 1 have shown a modification in which the head 3 is provided with flanges such as those shown at 3 and W on each angular face. The tool in this case is slipped into the slot 45 or 5 as the case may be at one end and the flanges prevent any lateral movement of the tool, such as might occur where the slot is open as shown in Fig. 1.

In Figs. 9 and 10, I have shown a further modification in which the slot 6 extends through the head 2 and the shank 1 In this form of the device the two spring portions made by the slot 6 are forced toward each other by means of the screw 15 and the opposing surface 16 of the tool post. This form of tool holder has only one slot 4 which extends parallel with the angular face 3 It will also be noted that the slot 6 is midway between the upper and lower surfaces of the tool. Such a tool holder as described in Figs 9 and 10 may be placed in the tool post in reverse position and used as a right or left tool as occasion demands. in this form, as in the one shown the tool is clamped in the angular slot. v I

In Figs. 11 and 12, I have shown a form which is similar to that shown in Figs. 9 and 10 with the exception that this tool holder has two faces at the forward edge of the head 2 which intersect at 3? and which is provided with angular slots l and 5 The slot 6 which extends inwardly from the head through the shank divides the shank 1 and the head 2 into two spring portions which may be clamped together to hold a tool inthe slots 411 and 5 by means of the screw 15 of the tool holder and the opposing wall 16".- r j I claim 2- 1. A tool holder comprising a shank, an integral head carried by said shank, said head having angular faces, the planes of said faces intersecting, and each face having angular slot extending inwardly fromthe face, the inner walls of the slots being parallel with said faces, said head being divided into two spring portions by means of a slot extending inwardly from the angular intersection of said faces toward the shank, and means for clamping, said spring portions together.

2. A tool holder comprising a shank, an integral. head carried by said shank, said head having angular faces, the planes of said faces intersecting, and each face having an angular slot extending inwardly from the face, the inner walls of the slots being parallel with said faces, said head being divided intotwo spring portions by means, of a slot extending inwardly from the ilar intersection of said faces toward the shank, means for clamping said spring portions together, said means comprising a stud bolt. secured in one portion and arranged to pass loosely through the other portion, and a nut disposed on said bolt and arranged to bear on one ofsaid portions.

3. A tool holder comprising ashank, an integral head carried by said shank, said head having angular faces, the planes of said aces intersecting,and each face having an angular slot extending inwardly from the face, the inner walls of the slots being parallel with said faces, said head being diadded into two spring portions by means of a slot extending iii'i'wardlyfrom the angular intersection of said faces toward the shank, flanges carried by each of said spring portions at the outer edges of said angular slots, and means for forcing said spring portions toward each other.

i. A tool holder coniiprising a shank hav ing an end face, a slot extending inwardly from said face,whose inner wall is parallel I ,idface, and whose lengthis'parallel t base of s being divided into two spring portions by a slotextending inwardly from said inner wall, and meansfor forcing said spring portionstoward each other. r i A tool holder comprising a shank havan end face, a slotjextending inwardly f1 in said face, whose inner wall is parallel with said face, and whose lengthis parallel with the base of said tool holder, said shank being divided into two sprin portions a slot extending inwardly from said inner wall, means for forcing'said spring portions toward each other, and dependent flanges carried byeach of said spring portions at the outer edge of said slot.

6. A tool holder'comprising a shank, an integral headcarried by said-shank, said head having angular faces, the planes of said faces intersecting,"and each face having d tool holder, said shank an angular slot extending inwardly from the face, said head being divided into two spring portions by means of a slot extendfor clamping said spring portions together;

. J JHi'l HARRY FRANZ.

Witnesses 'tonnn'r HnNNnssnY, linnnnn'r Hnnrnron.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner ofPaten'ts,

Washington, 1L0." v i 

